This sim is done quite right, with the key part of the article being "This model is the same as in the basic version, but includes basic economics, like debt (w

This sim is done quite right, with the key part of the article being "This model is the same as in the basic version, but includes basic economics, like debt (whithout interest) and investments that are proportional to the respective wealths of the spending and the receiving player" CLT dominates only if you do the sim wrong by making unrealistic simplifying assumptions (e.g. that each round is independent and variance is constant) that effectively eliminate the main parts of the simulated system and ensure that the simulation gets misleading results.